aboutsummaryrefslogtreecommitdiffstats
path: root/rpc/jeth.go
blob: e656e8fa93ffe8528e35c8a4ef1d23b808a1c078 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
package rpc

import (
    "encoding/json"

    "github.com/ethereum/go-ethereum/jsre"
    "github.com/ethereum/go-ethereum/rpc/api"
    "github.com/ethereum/go-ethereum/rpc/comms"
    "github.com/ethereum/go-ethereum/rpc/shared"
    "github.com/robertkrimen/otto"
)

type Jeth struct {
    ethApi api.EthereumApi
    re     *jsre.JSRE
    client comms.EthereumClient
}

func NewJeth(ethApi api.EthereumApi, re *jsre.JSRE, client comms.EthereumClient) *Jeth {
    return &Jeth{ethApi, re, client}
}

func (self *Jeth) err(call otto.FunctionCall, code int, msg string, id interface{}) (response otto.Value) {
    rpcerr := &shared.ErrorObject{code, msg}
    call.Otto.Set("ret_jsonrpc", api.JsonRpcVersion)
    call.Otto.Set("ret_id", id)
    call.Otto.Set("ret_error", rpcerr)
    response, _ = call.Otto.Run(`
        ret_response = { jsonrpc: ret_jsonrpc, id: ret_id, error: ret_error };
    `)
    return
}

func (self *Jeth) Send(call otto.FunctionCall) (response otto.Value) {
    reqif, err := call.Argument(0).Export()
    if err != nil {
        return self.err(call, -32700, err.Error(), nil)
    }

    jsonreq, err := json.Marshal(reqif)
    var reqs []shared.Request
    batch := true
    err = json.Unmarshal(jsonreq, &reqs)
    if err != nil {
        reqs = make([]shared.Request, 1)
        err = json.Unmarshal(jsonreq, &reqs[0])
        batch = false
    }

    call.Otto.Set("response_len", len(reqs))
    call.Otto.Run("var ret_response = new Array(response_len);")

    for i, req := range reqs {
        var respif interface{}
        err := self.client.Send(&req)
        if err != nil {
            return self.err(call, -32603, err.Error(), req.Id)
        }
        respif, err = self.client.Recv()
        if err != nil {
            return self.err(call, -32603, err.Error(), req.Id)
        }

        call.Otto.Set("ret_jsonrpc", api.JsonRpcVersion)
        call.Otto.Set("ret_id", req.Id)

        res, _ := json.Marshal(respif)

        call.Otto.Set("ret_result", string(res))
        call.Otto.Set("response_idx", i)
        response, err = call.Otto.Run(`
        ret_response[response_idx] = { jsonrpc: ret_jsonrpc, id: ret_id, result: JSON.parse(ret_result) };
        `)
    }

    if !batch {
        call.Otto.Run("ret_response = ret_response[0];")
    }

    if call.Argument(1).IsObject() {
        call.Otto.Set("callback", call.Argument(1))
        call.Otto.Run(`
        if (Object.prototype.toString.call(callback) == '[object Function]') {
            callback(null, ret_response);
        }
        `)
    }

    return
}